Portable cooler



FIG. 1 is a top, front right side perspective view of a portable cooler showing our new design.

FIG. 2 is an enlarged, top plan view thereof.

FIG. 3 is a front elevational view thereof. The opposite side has an identical appearance except that the release button shown under the handle would not appear on the opposite side.

FIG. 4 is an side elevational view thereof. The opposite side appears identical.

FIG. 5 is an enlarged bottom plan view thereof. 

The ornamental design for a portable cooler, as shown and described. 